1 /* 2 * Copyright 2019 Google LLC 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef FCP_SECAGG_SHARED_AES_PRNG_FACTORY_H_ 18 #define FCP_SECAGG_SHARED_AES_PRNG_FACTORY_H_ 19 20 #include <memory> 21 #include "fcp/secagg/shared/aes_key.h" 22 #include "fcp/secagg/shared/prng.h" 23 24 namespace fcp { 25 namespace secagg { 26 27 // Factory interface for AES-based deterministic pseudorandom number generators. 28 class AesPrngFactory { 29 public: 30 virtual ~AesPrngFactory() = default; 31 virtual std::unique_ptr<SecurePrng> MakePrng(const AesKey& key) const = 0; 32 // TODO(team): Remove this when transition to the batch mode of 33 // SecurePrng is fully done. 34 // The batch mode allows to retrive a large batch of preuso-random numbers 35 // in a single call. SupportsBatchMode()36 virtual bool SupportsBatchMode() const { return false; } 37 }; 38 39 } // namespace secagg 40 } // namespace fcp 41 42 #endif // FCP_SECAGG_SHARED_AES_PRNG_FACTORY_H_ 43